Problems with bookmarks and history not working properly can be caused by a corrupted places.sqlite database file. *http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox *https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file *http://kb.mozillazine.org/Lost_bookmarks You can try to check and repair the places database with this extension: *https://addons.mozilla.org/firefox/addon/places-maintenance/